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4 postsFilters: tag: dosimetry Clear
Dosimetric Electromagnetic Safety of People With Implants: A Neglected Population?
This dosimetric study evaluated whether existing EM safety guidelines protect individuals with conductive implants by assessing implant-related local field enhancements. Across 10 kHz to 1 GHz, the authors report large increases in psSAR10mg and local electric fields near implants, particularly below 100 MHz. In human anatomical models with implants exposed to an 85 kHz wireless power transfer coil and a 450 MHz dipole, the study reports guideline exceedances and elevated psSAR10mg, while the modeled temperature rise at 450 MHz remained under 0.4 K after six minutes. The authors conclude current guidelines are insufficient for people with implants and propose regulatory changes.
Evaluation of Exposure Assessment Methods and Procedures for Induction Hobs (Stoves)
This exposure-assessment study evaluated magnetic-field and contact-current exposures from modern induction hobs using IEC-based measurement procedures, 3D field scanning, and numerical dosimetry in anatomical models. It reports large between-hob variability in exposure and states that IEC 62233 may substantially underestimate user exposure. The authors argue that design modifications can reduce exposure and that product standards should be revised to better reflect realistic user scenarios.
Assessment of Electromagnetic Exposure to a Child and a Pregnant Woman Inside an Elevator in Mobile Frequencies
This study uses anatomically detailed computational models of a five-year-old girl, a pregnant woman in the third trimester, and a fetus to simulate mobile phone RF exposure inside an elevator cabin. Simulations at 1000 MHz and 1800 MHz across 48 configurations evaluated SAR10g, whole-body SAR, and maximum temperature. The abstract reports that configuration (positioning and phone orientation) can substantially change absorption and temperature metrics and calls for broader scenario testing to inform safety guidance for vulnerable populations.
Human achromatic flickers and phosphenes thresholds under extremely low frequency electric stimulations
This study estimated thresholds and locus for human phosphene perception during non-invasive transcranial alternating current stimulation at 20, 50, 60, and 100 Hz. Perception depended significantly on stimulation intensity, with the lowest threshold at 20 Hz and no reported phosphenes at 100 Hz. The authors report dosimetry consistent with a retinal origin and frame the findings as relevant for informing cautious ELF exposure limits in safety guidelines.